I have a Rca Refrigerator...Freezer

Question

I have a Rca Refrigerator...Freezer on top and fridge on lower half...I noticed a puddle of water a couple of months ago on the floor under the fridge on the linoleum floor..I mopped it up and this mornin', I noticed a puddle again..I do not see a place under the fridge where a tray might be to catch water. All I see are coils. Maybe you could give me some suggestions to check..Thanks, Idoj.